How to not rewrite variables when running a bash script at a time?

Question

linux

Good day.
Now there is a need to write a small utility in bash.
But ran into a problem. The script uses a lot of variables and if several people run the script at the same time, then the one who launched it last will interfere with the work of the first one by overwriting the values ​​of the variables.
As an example:
There is a number variable, the object number from the database is written to it when performing a search.
Naturally, when two employees launched the script, the first one executed the request and the value of the number variable became equal to 100, then the value of this variable is used more than once.
But when the second employee also executes the request, he overwrites the value of the variable. This interferes with the work of the first employee.
Is it possible to somehow isolate employees using bash? So that they do not interfere with each other.

Answer 1

What variables are we talking about?
Would a lockfile be suitable for you ?

Answer 2

In theory, they will not be overwritten anyway: each script runs in its own bash process, and if the variables are not exported, there should be no problem. If you need to limit the number of simultaneously running scripts, then flock can help.