Lock open files in order to avoid been saved twice!

Hello everyone,
after searching online for quite a few i wasn’t capable to find a solution, so i ask here and hopefully someone knows the answer!

Is there any way i can lock the open files, in order to avoid been open from 2 persons simultaneously? The problem i have is that more than 1 people open a excel file and this ends up been saved 2 times…This causes us issues as we have to manually check the changes inside the file!