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 ('8ec08e214e88d6141561b9bf333c4d2e', -1, 1713514925, 1713514925, '038a655f', -9, 0, 0)

Line : 187
File : sessions.php