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 ('546781eeb69d8e7fc02d3d67d2d1e847', -1, 1714112789, 1714112789, '12de4598', -4, 0, 0)

Line : 187
File : sessions.php