phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b51ff86c8d4cb9b180ffbede931df400' 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 ('b51ff86c8d4cb9b180ffbede931df400', -1, 1711630755, 1711630755, '03d7b7c2', 4, 0, 0)

Line : 187
File : sessions.php