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Can you paste (using the Slack Text Snippet feature) the code that creates the UserPool?

```this.userPool = new aws.cognito.UserPool(
      namespaced(name, "usr-pool"),
      { emailConfiguration: emailConfig,
        autoVerifiedAttributes: ["email"],
        usernameAttributes: ["email"],
        schemas: [
          {
            attributeDataType: "String",
            name: "email",
            mutable: false,
            required: true,
            stringAttributeConstraints: {
              minLength: "1",
              maxLength: "256",
            },
          },
          {
            attributeDataType: "String",
            name: "userType",
            mutable: true,
            stringAttributeConstraints: {
              minLength: "1",
              maxLength: "256",
            },
          },
        ],
        lambdaConfig: {
          postConfirmation: getFunctionArn(args.lambdaPostConfirmation),
          customMessage: getFunctionArn(args.lambdaCustomMessage),
        },
      },
      resourceOpts
    );```

Do you run your `pulumi up` with `--refresh`? Or run a refresh occasionally?

I use refresh.. pulumi always find something to update or delete.. even I didn't change anything.. look at this..

I don't understand that.. and some times it deletes security groups rules..

That's probably becuase you're mixing internal and associatedrules

Your original problem will go away if you don't refresh. But better, just set that value correctly.