phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '73c83e280cd7c41c76b51b3439d65ef1' 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 ('73c83e280cd7c41c76b51b3439d65ef1', -1, 1498348937, 1498348937, '36505dea', -4, 0, 0)

Line : 187
File : sessions.php