phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a661c8ab3e10997f816e526aff9ba50c' 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 ('a661c8ab3e10997f816e526aff9ba50c', -1, 1766199933, 1766199933, 'd849d819', 4, 0, 0)

Line : 187
File : sessions.php