Policy error

Question

When i try to apply below policy

{
"nameOfPolicy": "AllowStandardScheduleJobCollections",
"policyScope": "subscription",
"PolicyDefination": {
"if": {
"allOf": [{
"field": "type",
"equals": "Microsoft.Scheduler/jobcollections/properties"
},
{
"not": {
"field": "Microsoft.Scheduler/jobcollections/sku.name",
"in": ["Standard"]
}
}
]
},
"then": {
"effect": "deny"
}
}
},

I am getting below error

The provider 'Microsoft.Scheduler' referenced by the 'field' property 'Microsoft.Scheduler/jobcollections/sku.name' of the policy rule doesn't exist