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 ('8fe4f6f0da1bd03765e3df47d28d6e36', -1, 1713512730, 1713512730, '038fa8ac', -9, 0, 0)

Line : 187
File : sessions.php