Environment variable should probably be appended
The indicated environment variable is typically used as a list of folder paths, in which additional paths are added at the end. However, you specified that the variable's existing value (if any) should be overwritten in its entirety, which may cause problems on the target system.
This message is generated for environment variables with the following names (case-insensitive):
INCLUDE, LIB, Os2LibPath, PATH, PATHEXT, _NT_SYMBOL_PATH
You should review the situation and either change the environment variable's Install action to Append to existing value or Prepend to existing value, or convince yourself that the environment variable in question can be safely overwritten.
Environment Variable attributes