phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '780364dc643baef9ffed6f4312447f50' 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 ('780364dc643baef9ffed6f4312447f50', -1, 1770762157, 1770762157, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php