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 ('152aae6d5be2e5f9035d46293f6c0834', -1, 1711724959, 1711724959, '3656b45a', -2, 0, 0)

Line : 187
File : sessions.php