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 ('3502e8d97a8d82e343e1c3bd2736e9f1', -1, 1742103779, 1742103779, 'a28000000', -7, 0, 0)

Line : 187
File : sessions.php