phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8b880ca5e65009493560c0aff786ff66' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8b880ca5e65009493560c0aff786ff66', -1, 1771046949, 1771046949, 'd849d8d3', -9, 0, 0)

Line : 188
File : sessions.php