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 ('9eee9955e5821614f39690ffa1d2ed18', -1, 1713580271, 1713580271, '12dbec3e', -8, 0, 0)

Line : 187
File : sessions.php