Problems with updatecdt for a list

Good afternoon,

I am trying to make an updatecdt of a cdt that contains a text field that is a list, for the rest of the fields it maps well but for the list field as I am trying to enter more than one value it returns the following error:

This is the cdt and the particular field

the code:

updatecdt(
cdt: ri!entrada,
fieldsAndValues: (
{
timeStampConsulta: now(),

prueba: {

local!prueba


}}

)

The value of local!prueba is:

the test value at the input is empty

Can you help me please

Thank you

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