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 ('77a43a1f6387f93c8cae5f018b1c1f58', -1, 1713510455, 1713510455, '0387b7bb', 6, 0, 0)

Line : 187
File : sessions.php