FailedToTransactAsset when sending USDt from Statemint to another parachain

Question

Now that USDt is released on Statemint, we want to use this in our parachain 'Astar'. It was no problem to send USDt from Tether to Statemint but not possible to sent the asset to another parachain.

Call data used:

0x1f0801010100591f01000101008419a4ac409fa4e7bec032c696c526fac10ff9114d928df56ca0bf9e9ae291490104000002043205011f0082841e000000000000

Error displayed on PolkadotJS:

error: 1000000000: 
FailedToTransactAsset

We are aware that USDt on Statemint is not set as isSufficients so we have DOT in our wallet to be used as transaction fee. What the difference of approvals (see image)?

Answer 1

Problem solved! Because the asset is not set as isSufficient the sovereign account of the parachain needs to hold DOT on Statemint to transfer the asset through XCM.