phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b5168ab34b8a85f053161c7f3c44d006' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b5168ab34b8a85f053161c7f3c44d006', -1, 1770557330, 1770557330, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php