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 ('533ef14ecf83302dc3c91b9128059c22', -1, 1711632188, 1711632188, '22e62367', -10, 0, 0)

Line : 187
File : sessions.php