phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c5aac060ed481c0a9d5005f212c9dc52' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, session_user_agent, session_bot) VALUES ('c5aac060ed481c0a9d5005f212c9dc52', -1, 1781039848, 1781039848, '126109aa', -9, 0, 0, 'CCBot/2.0 (https://commoncrawl.org/faq/)' ,NULL)

Line : 275
File : sessions.php