phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '77e7ba465461718cb0a1b8909a5ac1b4' 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 ('77e7ba465461718cb0a1b8909a5ac1b4', -1, 1764846171, 1764846171, 'd849d887', -9, 0, 0)

Line : 187
File : sessions.php