phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '424a7f4c83c7cfd82e9301bf831ff856' 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 ('424a7f4c83c7cfd82e9301bf831ff856', -1, 1768224919, 1768224919, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php