Thanks again Joseph for prompt responses.
Recently I ran into an issue for the bridge mode SSIDs There were L2-VLANs that were created for bridge SSIDs on controller. And the moment, i deleted those L2-VLANs for bridged SSID, the client dropped and were not able to join back the controller.
Only after creating back the L2 VLANs on the controller for the bridge SSIDs, i was able to get the client association moving fine.
Thus I am really confused, whether we really require to create an L2 VLAN for the bridge SSIDs or not?
From general understanding and your response, no. But after deleting them, the clients association started failing.