Insert into the database from 2 different sources

Ignition
14

Hello, I am facing the similar issue. That I want to insert entire dataset into database table.
I followed the code by @lrose but getting below error.

Code:

data1 = system.tag.read("[default]TEST/Tag").value
pyData = system.dataset.toPyDataSet(data1)
query = "INSERT INTO  MyTable (C1, C2, C3, C4, C5, C6, C7) VALUES %s"
                            
valueArgs = ','.join(['(?,?,?,?,?,?,?)']  * data1.getRowCount())
argList = [row for row in pyData]
system.db.runPrepUpdate(query % valueArgs, argList, 'MyDB')

Error:

Caused by: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Unable to decode arguments

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:351)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:325)

	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:278)

	at com.inductiveautomation.ignition.client.script.ClientDBUtilities._runPrepStmt(ClientDBUtilities.java:288)

	at com.inductiveautomation.ignition.common.script.builtin.AbstractDBUtilities.runPrepUpdate(AbstractDBUtilities.java:261)

	... 23 more

Caused by: java.io.InvalidClassException: failed to read class descriptor

I am not sure what I am missing here.