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 ('9834698872a5efbe1f83dd5396291bfc', -1, 1730415524, 1730415524, '1275b90c', -1280, 0, 0)

Line : 195
File : sessions.php