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) VALUES ('955f0960c67c2ed2980b3f2b315b8a77', -1, 1714607978, 1714607978, '038579a0', 0, 0)

Line : 158
File : sessions.php