How to build the correct if condition?

Question

cmd/bat

Hello. Please help me improve the script. The idea is to take a line from the file and substitute its phrase "Enter ver:"
For example, if in the file 11111 it turned out to be Enter ver: 11111
And if the user presses enter, then the value 11111 was written to the %var% variable. And if the user enters that sometimes by hand and presses enter, then what he entered by hand was written to the% var% variable.

@echo off
:next
Set file=D:\version
For /F "usebackq tokens=* delims=" %%i In ("%file%") Do Set vap=%%i
set /p var="Enter ver: %vap%"
if "%var%" neq "%var:,=%" goto next