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 ('9d64e446fa8e9ff0f51375fd7d56905c', -1, 1754878700, 1754878700, '031569d7', 2, 0, 0)

Line : 189
File : sessions.php