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 ('edc86214ba11392e52e8d1d620b4369d', -1, 1713517963, 1713517963, '12776f09', -10, 0, 0)

Line : 187
File : sessions.php