phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a210d37fa996b4fe53803d454ab20fe6' 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 ('a210d37fa996b4fe53803d454ab20fe6', -1, 1757951867, 1757951867, 'd849d8bd', 23, 0, 0)

Line : 187
File : sessions.php