Support intro
Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 28.0.2.5
Operating system and version (eg, Ubuntu 20.04): ubuntu 22.04.3
Apache or nginx version (eg, Apache 2.4.25): NGinx 1.25
PHP version (eg, 7.4): 8.2.15
The issue you are facing:
drag an drop a folder or file to a nextcloud destination
re-drag and drop the same folder (same contents) or same file to the same nc destination
→ no ask for "file already exist - overwirte? nor anything else
NC just overwrite files and /or folders if this behaviour is reproducable for others too please feel free to post here - i have tested now for several filetypes, destinations (homedir / groupfolders / etc)
all the same!
Is this the first time you’ve seen this error? (Y/N): Y (!)
Steps to replicate it:
- upload files / folders to nc
- upload same content a second time to the same destination
- have no hint or warning overwriting existing content (could accidentically happen)
The output of your Nextcloud log in Admin > Logging:
nothing
This doesn’t happen if using webdav via e.g. double-commander or any other tool that is able to establish webdav connections
The behaviour happen when using drag and drop.
Using the button of nc + new file does deliver the question which version you will keep or overwrite → so drag and drop seems to have different behaviour!