Missing answers

[Fabryce]

Hello, in the responses of my Forms, there appear the responses of IDs 51 and above but I do not have the IDs from the beginning, how can I retrieve them.  There is an example 

Hello, 

in the responses of my Forms, there appear the responses of IDs 51 and above but I do not have the IDs from the beginning, how can I retrieve them.  There is an example of my excel sheet.

[#2]

@Fabryce 

If the responses are still visible in the responses tab, you can synchronize them to a new workbook.

[#3]

Thank you for your answer, I synchronized but got the same data.

I found the solution by checking the old Excel files and I don't know why the new data was written after the old ones, wich is why the new answers start at ID 51.

Have a nice day!