phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c81cb1f7837d781d196df30ad150029d' 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 ('c81cb1f7837d781d196df30ad150029d', -1, 1761799707, 1761799707, 'd849d838', -4, 0, 0)

Line : 187
File : sessions.php