Why is this an issue?

Using multiple times same the name for different constants is confusing. Names should be unique and should describe the functionality.

How to fix it

Code examples

Noncompliant code example

File 1:
constant fly : t1;

File 2:
constant fly : t1;

Compliant solution

File 1:
constant fly : t1;

File 2:
constant dream : t1;