Why is this an issue?

More than one rule in a configuration targets the same cell or instance. They cannot both be used. The first one is taken into account; others are ignored.

Remove the duplicated configuration rules.

How to fix it

Code examples

Noncompliant code example

module fly;
endmodule

config cfg;
  design fly;
  instance fly.foo use bar;
  instance fly.foo use baz; // Noncompliant
endconfig

Compliant solution

module fly;
endmodule

config cfg;
  design fly;
  instance fly.foo use bar;
endconfig