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 ('8da21fa6b5cba0229c7b70cde57f40ef', -1, 1711642451, 1711642451, '2cc8f92a', -1, 0, 0)

Line : 187
File : sessions.php