New Microsoft Excel Worksheet.xlsx is locked for editing by "username". Click "Notify" to open a read-only copy of the document and receive notification when the document is no longer in use.

Hi,

In SharePoint 2013 Library, I open the file in explorer from SharePoint document library ribbion. In explorer I right click and created the excel file. After creating the file in explorer once I open the file to enter the record Its shows below message :-

Checked Out Required to modified the server work book

when I click on Check Out button then its shows below message

New Microsoft Excel Worksheet.xlsx is locked for editing by "username".
Click "Notify" to open a read-only copy of the document and receive notification when the document is no longer in use.

I just created the new file in explorer and its not open or use by anyone then why its showing second above message New Microsoft Excel Worksheet locked.

Please advice.