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 ('4e5c11bd5e428b50985b09365231b0fa', -1, 1713996004, 1713996004, '12dbec3e', 7, 0, 0)

Line : 187
File : sessions.php