Filename got extra space at the end and unable to replace the file

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Hi @Sudheer

Good day, I hope you are doing well.  

Looks like you are encountering an classic SharePoint / OneDrive filename restriction. SharePoint does not allow trailing spaces (or leading spaces) in file names. Even though the file was uploaded with an extra space at the end, the system treats a filename with a trailing space as different from the same name without the space. This is why you cannot easily replace or overwrite the file. 

You could try to rename the existing file to remove the trailing space to troubleshoot it: 

Go to the SharePoint document library in your browser. 

Find the PDF file. 

Click the ⋯ (ellipsis) next to the file > Rename. 

Remove the extra space at the end of the filename (make sure it ends with .pdf with no space before it). 

Click Save / Rename. 

After renaming, try uploading your new version again, it should now overwrite properly. 

If renaming does not work, you could try to upload your new PDF with a slightly different name (filename - updated.pdf). 

Once uploaded, delete the old file that has the trailing space. 

Then rename the new file to the correct name. 

Additionally, you may try using a PowerShell cmdlet to resolve this issue by explicitly renaming the file to remove the trailing space. Run: 

Connect-PnPOnline -Url https://tenant.sharepoint.com/sites/SiteName -Interactive 
Rename-PnPFile ` 
  -ServerRelativeUrl "/sites/yoursite/Shared Documents/YourFileName .pdf" ` 
  -TargetFileName "YourFileName.pdf" ` 
  -Force 
`` 

References: 

Restrictions and limitations in OneDrive and SharePoint - Microsoft Support 

powershell/documentation/Rename-PnPFile.md at dev · pnp/powershell · GitHub 

I hope this helps. 

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