empty selector is invalid

[mdkhvn]

hi
i want to install it on my k8s cluster version 1.17.3 i gave error about version and selector!
first of all i change apps/v1beta2 to apps/v1 then give error about (validating data) and i use tag to ignore this error with (--validate=false) then give error like bellow:
The StatefulSet "mysql" is invalid:

• spec.selector: Required value
• spec.template.metadata.labels: Invalid value: map[string]string{"name":"mysql"}: selector does not match template labels
  then i change yaml file and put selector there like this:
  apiVersion: apps/v1
  kind: StatefulSet
  metadata:
  name: mysql
  labels:
  name: mysql
  spec:
  serviceName: "mysql"
  replicas: 3
  selector:
  matchlabels:
  app: mysql
  then give another error!
  The StatefulSet "mysql" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string(nil), MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: empty selector is invalid for statefulset
  could yo help me to solve this issue?!