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 ('9c5aef50d8d22e2bd72dbb1e9de6fa81', -1, 1713537316, 1713537316, '0389aab7', 0, 0, 0)

Line : 187
File : sessions.php