phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'dc6775f7a4ab6aef93317bf5fcfc0070' 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 ('dc6775f7a4ab6aef93317bf5fcfc0070', -1, 1770654863, 1770654863, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php