Dragino lgt-92 v. 1.5.1 Quectel L76-L

I am trying to register a new Dragino Lgt-92 v 1.5.1 device, Quectel L76-L but unfortunately The Things Stack does not connect the device. With Dragino LGT-92 v 1.6.0, uBlox I have no problems. Why? Maybe LoRaWAN network-layer settings wrong? Could anyone help me?