phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c71972b6d57693ca8b8cda42f13d4e3f' 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) VALUES ('c71972b6d57693ca8b8cda42f13d4e3f', -1, 1780602444, 1780602444, 'c0a81011', -501, 0, 0)

Line : 187
File : sessions.php