phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '81f97326d06b6c4cb0d0eb961b1b8aaf' 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 ('81f97326d06b6c4cb0d0eb961b1b8aaf', -1, 1758730559, 1758730559, 'd849d80a', -4, 0, 0)

Line : 187
File : sessions.php