diff --git a/changes/2946.fix.md b/changes/2946.fix.md
new file mode 100644
index 0000000000..2176d57eb0
--- /dev/null
+++ b/changes/2946.fix.md
@@ -0,0 +1 @@
+Set the `postgres_readonly` flag to `false` when begin generic sessions
diff --git a/src/ai/backend/manager/models/utils.py b/src/ai/backend/manager/models/utils.py
index 0dc596e8ea..2731b9fce4 100644
--- a/src/ai/backend/manager/models/utils.py
+++ b/src/ai/backend/manager/models/utils.py
@@ -103,7 +103,10 @@ async def _begin(self, connection: SAConnection) -> AsyncIterator[SAConnection]:
         """
         Begin generic transaction within the given connection.
         """
-        async with connection.begin():
+        conn_with_exec_opts = await connection.execution_options(
+            postgresql_readonly=False,
+        )
+        async with conn_with_exec_opts.begin():
             self._generic_txn_count += 1
             self._check_generic_txn_cnt()
             try: