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 ('c0ee31b067113beb69c6aba445e2baf6', -1, 1713996115, 1713996115, '12bc28cf', -4, 0, 0)

Line : 187
File : sessions.php