diff --git a/backend/src/baserow/contrib/database/migrations/0170_update_password_tsv_fields.py b/backend/src/baserow/contrib/database/migrations/0170_update_password_tsv_fields.py
index 154a1061fa..5669b60a99 100644
--- a/backend/src/baserow/contrib/database/migrations/0170_update_password_tsv_fields.py
+++ b/backend/src/baserow/contrib/database/migrations/0170_update_password_tsv_fields.py
@@ -32,4 +32,4 @@ class Migration(migrations.Migration):
         ("database", "0169_alter_galleryview_card_cover_image_field"),
     ]
 
-    operations = [migrations.RunSQL(update_password_tsv_index)]
+    operations = [migrations.RunSQL(update_password_tsv_index, migrations.RunSQL.noop)]
diff --git a/backend/src/baserow/core/pgvector.py b/backend/src/baserow/core/pgvector.py
index d0678a6475..890c52e7f5 100644
--- a/backend/src/baserow/core/pgvector.py
+++ b/backend/src/baserow/core/pgvector.py
@@ -45,9 +45,6 @@ def try_enable_pgvector() -> bool:
     :return: True if the extension is now enabled, False otherwise.
     """
 
-    if is_pgvector_enabled():
-        return True
-
     try:
         with connection.cursor() as cursor:
             cursor.execute("CREATE EXTENSION IF NOT EXISTS vector;")
@@ -321,6 +318,15 @@ def try_migrate_vector_fields(sender, **kwargs):
     previously disabled, so that the field and index can be created later.
     """
 
+    # Check if the ContentType for SchemaOperation exists. If not, it means the
+    # core migrations haven't fully run yet (e.g., in migration tests with a
+    # separate database), so we skip the vector field migration.
+    if not ContentType.objects.filter(
+        app_label="core", model="schemaoperation"
+    ).exists():
+        print("skipped (SchemaOperation content type not ready).")
+        return
+
     was_enabled = is_pgvector_enabled()
     pgvector_enabled = try_enable_pgvector()
 
diff --git a/backend/src/baserow/test_utils/pytest_conftest.py b/backend/src/baserow/test_utils/pytest_conftest.py
index 01fabb1bad..de8f5b142c 100755
--- a/backend/src/baserow/test_utils/pytest_conftest.py
+++ b/backend/src/baserow/test_utils/pytest_conftest.py
@@ -828,6 +828,14 @@ def second_separate_database_for_migrations(
     _set_suffix_to_test_databases(suffix)
 
     with django_db_blocker.unblock():
+        # Clear ContentType cache before setting up the second database.
+        # The cache may contain IDs from the first test database, which would
+        # cause foreign key violations when post_migrate signals try to create
+        # records referencing ContentTypes in the new database.
+        from django.contrib.contenttypes.models import ContentType
+
+        ContentType.objects.clear_cache()
+
         db_cfg = setup_databases(
             verbosity=request.config.option.verbose,
             interactive=False,
diff --git a/enterprise/backend/src/baserow_enterprise/migrations/0044_migrate_app_labels.py b/enterprise/backend/src/baserow_enterprise/migrations/0044_migrate_app_labels.py
index 0d0226069f..e8c28d1057 100644
--- a/enterprise/backend/src/baserow_enterprise/migrations/0044_migrate_app_labels.py
+++ b/enterprise/backend/src/baserow_enterprise/migrations/0044_migrate_app_labels.py
@@ -29,5 +29,5 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-        migrations.RunPython(migrate_app_labels),
+        migrations.RunPython(migrate_app_labels, migrations.RunPython.noop),
     ]