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 ('38aea30b24f2757ed0f0a87c9ba07cf2', -1, 1709340485, 1709340485, '22cca9e6', 2, 0, 0)

Line : 187
File : sessions.php