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 ('fdab94a358b7ca61551cb7f19544f0dc', -1, 1713979506, 1713979506, '12be9cd4', 2, 0, 0)

Line : 187
File : sessions.php