Server side close

[MarcRohrer]

Hi,

I experience the following kind of error

CL-USER> (testpkg:testfunc "teststring")  
; Debugger entered on #<SB-INT:SIMPLE-READER-PACKAGE-ERROR "The symbol ~S is not external in the ~A package." {236425E1}>  
[1] CL-USER>  
; Evaluation aborted on #<SB-INT:SIMPLE-READER-PACKAGE-ERROR "The symbol ~S is not external in the ~A package." {236425E1}>  
; Server side close  
; --------------------------------------------------------  

whenever I happen to have a coding error. The repl still runs in the backgrund. I then kill the buffer and start sly again. I am then asked:

[sly] Switch to open connection?  
  (Customize ``sly-command-switch-to-existing-lisp' to avoid this prompt.)  
  Connections:   
sbcl  
(start a new one)  

When I connect ot the existing one, everything seems fine.
Can this behavior be prevented?

I run Emacs 28.2. on Windows 10.

regards

Marc