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 ('5bf35e72d9728f29093c94a1b87493e0', -1, 1713896116, 1713896116, '03856dd3', 5, 0, 0)

Line : 187
File : sessions.php