phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '70f5b5ec2263bf5b87d6a9ca5689dc18' 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 ('70f5b5ec2263bf5b87d6a9ca5689dc18', -1, 1770113828, 1770113828, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php