Eloqua BULK API limit of import definitions

Hello,

According to Eloqua best practices, it's not recommended to send data to an import definition, while previous sync isn't finished yet. I have tested the behavior of Eloqua BULK API, and found no issues when sending the data to an import definition, while sync is still running. However, I don't whant to design an architecture, which doesn't suits Eloqua recommendations. And within our architecture, there is a slight chance, that we send data to a definition, while sync is still running.

As a solution, we can create new import definition for each request. Which can be automatically deleted later. But although we delete a definition, the ID of newly created definition is always incrementing. Therefore, we ran into a consideration, if there's a limit of total import definitions to be created?