diff --git a/.api-reports/api-report-core.md b/.api-reports/api-report-core.md
index 24cf06f5a60..4d86ebc77c6 100644
--- a/.api-reports/api-report-core.md
+++ b/.api-reports/api-report-core.md
@@ -2226,7 +2226,7 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/link/http/selectHttpOptionsAndBody.ts:128:32 - (ae-forgotten-export) The symbol "HttpQueryOptions" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react.md b/.api-reports/api-report-react.md
index 3489e1e54c3..7ffee6ffb39 100644
--- a/.api-reports/api-report-react.md
+++ b/.api-reports/api-report-react.md
@@ -2391,7 +2391,7 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_components.md b/.api-reports/api-report-react_components.md
index 8307e63ec9c..e567f4b2cec 100644
--- a/.api-reports/api-report-react_components.md
+++ b/.api-reports/api-report-react_components.md
@@ -1733,7 +1733,7 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_context.md b/.api-reports/api-report-react_context.md
index 337281bb134..02bd085dccf 100644
--- a/.api-reports/api-report-react_context.md
+++ b/.api-reports/api-report-react_context.md
@@ -1656,7 +1656,7 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_hoc.md b/.api-reports/api-report-react_hoc.md
index 2be6017e01e..15f30dae2df 100644
--- a/.api-reports/api-report-react_hoc.md
+++ b/.api-reports/api-report-react_hoc.md
@@ -1685,7 +1685,7 @@ export function withSubscription<TProps extends TGraphQLVariables | {} = {}, TDa
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_hooks.md b/.api-reports/api-report-react_hooks.md
index de2c0e84f6c..e04a5a88e94 100644
--- a/.api-reports/api-report-react_hooks.md
+++ b/.api-reports/api-report-react_hooks.md
@@ -2227,7 +2227,7 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_internal.md b/.api-reports/api-report-react_internal.md
index fb9449336cd..67cf910b346 100644
--- a/.api-reports/api-report-react_internal.md
+++ b/.api-reports/api-report-react_internal.md
@@ -1688,7 +1688,7 @@ export function wrapQueryRef<TData, TVariables extends OperationVariables>(inter
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_ssr.md b/.api-reports/api-report-react_ssr.md
index a6057e4a7eb..477152f332d 100644
--- a/.api-reports/api-report-react_ssr.md
+++ b/.api-reports/api-report-react_ssr.md
@@ -1641,7 +1641,7 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-testing.md b/.api-reports/api-report-testing.md
index 5b4ae8e658b..9be1fc3e0db 100644
--- a/.api-reports/api-report-testing.md
+++ b/.api-reports/api-report-testing.md
@@ -1703,7 +1703,7 @@ export function withWarningSpy<TArgs extends any[], TResult>(it: (...args: TArgs
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-testing_core.md b/.api-reports/api-report-testing_core.md
index 202108f79c7..0243870d739 100644
--- a/.api-reports/api-report-testing_core.md
+++ b/.api-reports/api-report-testing_core.md
@@ -1660,7 +1660,7 @@ export function withWarningSpy<TArgs extends any[], TResult>(it: (...args: TArgs
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-utilities.md b/.api-reports/api-report-utilities.md
index 715d0827a56..24248cc6669 100644
--- a/.api-reports/api-report-utilities.md
+++ b/.api-reports/api-report-utilities.md
@@ -2635,7 +2635,7 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report.md b/.api-reports/api-report.md
index 9040bd40123..0a415adcd95 100644
--- a/.api-reports/api-report.md
+++ b/.api-reports/api-report.md
@@ -3071,7 +3071,7 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:399:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
 // src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/link/http/selectHttpOptionsAndBody.ts:128:32 - (ae-forgotten-export) The symbol "HttpQueryOptions" needs to be exported by the entry point index.d.ts
diff --git a/.changeset/wet-jars-laugh.md b/.changeset/wet-jars-laugh.md
new file mode 100644
index 00000000000..c52db26820c
--- /dev/null
+++ b/.changeset/wet-jars-laugh.md
@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Remove error thrown by `inFlightLinkObservables` intended to be removed before 3.9 release.
diff --git a/.size-limits.json b/.size-limits.json
index 44d275b37a4..f2fb4219418 100644
--- a/.size-limits.json
+++ b/.size-limits.json
@@ -1,4 +1,4 @@
 {
-  "dist/apollo-client.min.cjs": 39153,
-  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 32652
+  "dist/apollo-client.min.cjs": 39061,
+  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 32559
 }
diff --git a/src/core/QueryManager.ts b/src/core/QueryManager.ts
index bc78a3bf224..00a0f95ff09 100644
--- a/src/core/QueryManager.ts
+++ b/src/core/QueryManager.ts
@@ -188,15 +188,6 @@ export class QueryManager<TStore> {
     if ((this.onBroadcast = onBroadcast)) {
       this.mutationStore = Object.create(null);
     }
-
-    // TODO: remove before we release 3.9
-    Object.defineProperty(this.inFlightLinkObservables, "get", {
-      value: () => {
-        throw new Error(
-          "This version of Apollo Client requires at least @apollo/experimental-nextjs-app-support version 0.5.2."
-        );
-      },
-    });
   }
 
   /**