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 ('a245d1cdd403c21ff2f6f53be3aadb19', -1, 1713956013, 1713956013, '038dcabb', -8, 0, 0)

Line : 187
File : sessions.php