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 ('69ba6a680a341c5048e44b6ba1ead6a9', -1, 1730415681, 1730415681, '030fd0ee', 18, 0, 0)

Line : 195
File : sessions.php