In the Dataverse, once a table is deleted, its name is not immediately released. The actual deletion of the table and freeing up of the name happens during a maintenance process which runs periodically.
You should eventually be able to reuse the table name, but there is unfortunately no way to manually trigger this cleanup process, nor a way to see exactly when the name will become available again.
The period before the table name becomes available again can vary, but it often takes about 24 hours. In some cases, it might take longer depending on the server load and other factors.
In the meantime, if you need to continue developing your solution, consider using a slightly different table name. Once the original name becomes available, you can rename the table.
