This error indicates you have sent too many requests in a given amount of time or exceeded a limit on deployments. See Rate and resource limiting for more details.
This example shows an attempt to create an include when the limit per contract has been reached:
{
"type": "https://problems.luna.akamaiapis.net/papi/v1/limit-exceeded",
"title": "Too many includes",
"detail": "Too many includes exist on contract ctr_1-12345. You must delete an include before continuing.",
"instance": "/papi/v1/includes?contractId=1-12345&groupId=12345#abc12345abcc02a7",
"status": 429,
"limitKey": "INCLUDES_PER_CONTRACT",
"instanceKey": "1-12345",
"limit": 500,
"remaining": 0
}