Thanks for reaching out to the Adobe Stock community.
You can use the same license twice, however, please make sure that if you are using the same asset for different clients, the asset should be licensed separately so that it is legitimate. Refer to Common Questions, Adobe Stock
If the asset is to be used by your client, I would suggest you to have the license transferred to your client in order to prevent confusion wherein the client needs to sign a written statement indicating that they will follow the stipulation in the Stock licensing Term.
Feel free to update this thread in case of any additional questions.