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 ('e256c28f8e0c031fcca83ddfed7ee977', -1, 1714099980, 1714099980, '038bed82', -4, 0, 0)

Line : 187
File : sessions.php