diff --git a/src/publish.mts b/src/publish.mts
index e4717333..40567bd3 100644
--- a/src/publish.mts
+++ b/src/publish.mts
@@ -62,24 +62,31 @@ export const publish = async (pluginConfig: Config & UserConfig, context: Publis
     }
 
     const url = `${process.env.CI_SERVER_URL!}/api/v4/projects/${projectId}/packages/nuget/index.json`;
-    context.logger.log(`Adding GitLab as NuGet source ${url}`);
-    await execa(
-      dotnet,
-      [
-        "nuget",
-        "add",
-        "source",
-        url,
-        "--name",
-        "gitlab",
-        "--username",
-        gitlabUser,
-        "--password",
-        gitlabToken,
-        "--store-password-in-clear-text",
-      ],
-      { stdio: "inherit" },
-    );
+
+    // Check if there is already a NuGet source with the GitLab url before adding it
+    const { stdout } = await execa(dotnet, ["nuget", "list", "source", "--format", "short"]);
+    if (stdout?.includes(url) === true) {
+      context.logger.log(`GitLab NuGet source ${url} already exists, skip adding`);
+    } else {
+      context.logger.log(`Adding GitLab as NuGet source ${url}`);
+      await execa(
+        dotnet,
+        [
+          "nuget",
+          "add",
+          "source",
+          url,
+          "--name",
+          "gitlab",
+          "--username",
+          gitlabUser,
+          "--password",
+          gitlabToken,
+          "--store-password-in-clear-text",
+        ],
+        { stdio: "inherit" },
+      );
+    }
 
     const cliArgs = [...baseCliArgs, "--source", "gitlab", `${packagePath}/*.nupkg`];
 
diff --git a/test/publish.test.mts b/test/publish.test.mts
index a1c12efa..f54c7599 100644
--- a/test/publish.test.mts
+++ b/test/publish.test.mts
@@ -1,5 +1,5 @@
 import { afterEach, beforeAll, describe, expect, it, jest } from "@jest/globals";
-import type { ExecaChildProcess, ExecaError, execa } from "execa";
+import type { ExecaChildProcess, ExecaError, ExecaReturnBase, execa } from "execa";
 import { PublishContext } from "semantic-release";
 import { publishFailed } from "../src/Helper.mjs";
 import type { publish as publishType } from "../src/publish.mjs";
@@ -234,6 +234,13 @@ describe("publish", () => {
   });
 
   it("should use gitlabRegistryProjectId over CI_PROJECT_ID if set", async () => {
+    execaMock.mockImplementationOnce(() => {
+      return {
+        stdout:
+          "dotnet nuget push -s https://gitlab.com/api/v4/projects/12345/packages/nuget/index.json -k 104E4 out/*.nupkg",
+        exitCode: 0,
+      } as Partial<ExecaReturnBase<string>> as never;
+    });
     execaMock.mockImplementationOnce(() => {
       return {
         command:
@@ -255,8 +262,8 @@ describe("publish", () => {
       context,
     );
 
-    expect(execaMock).toHaveBeenCalledTimes(2);
-    expect(execaMock.mock.calls[0]).toEqual([
+    expect(execaMock).toHaveBeenCalledTimes(3);
+    expect(execaMock.mock.calls[1]).toEqual([
       "dotnet",
       [
         "nuget",