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 ('5ea0f8a4b21e9d6674320c62890292a2', -1, 1713916765, 1713916765, '03913c95', -10, 0, 0)

Line : 187
File : sessions.php