phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cc5c9c7c13f94a8f8ea0dc75d6f4ec77' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('cc5c9c7c13f94a8f8ea0dc75d6f4ec77', -1, 1770531434, 1770531434, 'd849d897', -4, 0, 0)

Line : 187
File : sessions.php