phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('dc86666d8e950effc988f9328c8f4ba3', -1, 1748504368, 1748504368, '12be9b03', -9, 0, 0)

Line : 190
File : sessions.php