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 ('749bd462018b1d02b2f52fb0377d038c', -1, 1714328667, 1714328667, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php