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 ('7a252b8ab3cd5d60af1444a28d4f99b7', -1, 1713912258, 1713912258, '0391177b', -4, 0, 0)

Line : 187
File : sessions.php