*** /tmp/ediffwcSDZb	2022-03-30 13:50:29.736061472 +0200
--- /home/albinus/src/emacs-27/lisp/net/tramp-sh.el	2022-03-30 13:50:18.051914192 +0200
***************
*** 4958,4963 ****
--- 4958,4964 ----
      ;; If Tramp opens the same connection within a short time frame,
      ;; there is a problem.  We shall signal this.
      (unless (or (process-live-p p)
+                 (and (processp p) (not non-essential))
  		(not (tramp-file-name-equal-p
  		      vec (car tramp-current-connection)))
  		(time-less-p