diff --git a/internal/proxy/task.go b/internal/proxy/task.go
index e6488aa3627ff..023138ee309d8 100644
--- a/internal/proxy/task.go
+++ b/internal/proxy/task.go
@@ -1246,14 +1246,11 @@ func (t *alterCollectionFieldTask) PreExecute(ctx context.Context) error {
 			if !IsStringType {
 				return merr.WrapErrParameterInvalid(fieldName, "%s can not modify the maxlength for non-string types", schemapb.DataType_name[dataType])
 			}
-			value, err := strconv.Atoi(prop.Value)
+			_, err := strconv.Atoi(prop.Value)
 			if err != nil {
 				return merr.WrapErrParameterInvalid("%s should be an integer, but got %T", prop.Key, prop.Value)
 			}
 
-			if value > defaultMaxVarCharLength {
-				return merr.WrapErrParameterInvalid("%s exceeds the maximum allowed value 65535", prop.Value)
-			}
 		}
 	}
 
diff --git a/internal/proxy/util.go b/internal/proxy/util.go
index a159e2d950777..ead13707f7b9f 100644
--- a/internal/proxy/util.go
+++ b/internal/proxy/util.go
@@ -364,8 +364,8 @@ func validateMaxLengthPerRow(collectionName string, field *schemapb.FieldSchema)
 		if err != nil {
 			return err
 		}
-		if maxLengthPerRow > defaultMaxVarCharLength || maxLengthPerRow <= 0 {
-			return merr.WrapErrParameterInvalidMsg("the maximum length specified for a VarChar should be in (0, 65535]")
+		if maxLengthPerRow <= 0 {
+			return merr.WrapErrParameterInvalidMsg("the maximum length specified for a VarChar should be greater than 0")
 		}
 		exist = true
 	}