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 ('87f15a2c93c88ac5c2530e64b4699b5f', -1, 1714012215, 1714012215, '0d3a2717', -10, 0, 0)

Line : 187
File : sessions.php