Delete graph

so you are using: https://dgraph.io/docs/clients/java/#altering-the-database ?

I am wondering if maybe you are being blocked by:

An alter operation will also fail if one is already in progress with an error schema is already being modified. Please retry . Though, mutations can be successfully executed while indexing is going on.

So indexing should not block you, but an ongoing schema update would.

But maybe this will add some more context to what you are trying to achieve: