save-place-version-control

save-place-version-control is a variable defined in `saveplace.el'.
Its value is

nil

Documentation:
Controls whether to make numbered backups of master save-place file.
It can have four values: t, nil, `never', and `nospecial'. The first
three have the same meaning that they do for the variable
`version-control', and the final value `nospecial' means just use the
value of `version-control'.

You can customize this variable.