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 ('8aff686b6af3d6cff12dd8e36458eaf3', -1, 1730416729, 1730416729, '03910c00', 8, 0, 0)

Line : 195
File : sessions.php