phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : -1 ERROR: duplicate key value violates unique constraint "phpbb_session_pkey" DETAIL: Key ("session_id")=(44a4e8db6f43f2fdfe7189bb3962d72c) already exists.

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('44a4e8db6f43f2fdfe7189bb3962d72c', -1, 1788659700, 1788659700, 'd849d829', -9, 0, 0)

Line : 187
File : sessions.php