must be specified for pod

This error message usually indicates that a required field or parameter is missing in the configuration of a Kubernetes Pod. The most common cause of this error is a missing or invalid value for the `spec.containers.image` field, which specifies the container image to use for the Pod.

To resolve this error, you should review the configuration of your Pod and ensure that all required fields are filled in with valid values. You may also need to check for typos or other errors in your configuration file.

For example, if you are trying to create a Pod using the `kubectl` command-line tool, you might see an error like:

error: error validating "pod.yaml": error validating data: [ValidationError(Pod.spec.containers[0].image): invalid type for io.k8s.api.core.v1.Container.image: got "int", expected "string"]; if you choose to ignore these errors, turn validation off with --validate=false

In this case, the error message indicates that the `spec.containers.image` field is expecting a string value, but instead received an integer. You would need to update the value of this field to a valid container image name or URL.