Remove the selected record from the Custom Picker List

Hi I would like to remove the selected record from the Custom Picker. But the below code throws error.

In code labels and identifiers are same as i need only name.

Code Snippet:

a!localVariables(
local!selIndex,
local!selItem,
local!selectedRecord:rule!ACRA_GetExistingInfo(),
local!currentRecords:a!refreshVariable(
value:if(a!isNullOrEmpty(ri!selectedProducts),
null(),
ri!selectedProducts),
refreshOnReferencedVarChange: true
),
local!recordLabels: a!refreshVariable(
value:if(a!isNullOrEmpty(local!currentRecords),
local!selectedRecord.proposedName,
remove(local!selectedRecord,
tointeger(wherecontains(
touniformstring(local!currentRecords.proposedName),
touniformstring(local!selectedRecord.proposedName)
))).proposedName
),
refreshOnReferencedVarChange: true
),
/*local!recordLabels:local!selectedRecord.proposedName,*/
local!newRow:'type!{urn:com:appian:types:ACRA}ACRA_ProposedNamesInfo'(),
local!products:'type!{urn:com:appian:types:ACRA}ACRA_ProposedNamesInfo'(),
a!gridLayout(
label: "Editable Grid",
labelPosition: "ABOVE",
headerCells: {
a!gridLayoutHeaderCell(label: "Id"),
a!gridLayoutHeaderCell(label: "Picker"),
a!gridLayoutHeaderCell(label: "Selected Name"),
},
columnConfigs: {
a!gridLayoutColumnConfig(width:"DISTRIBUTE", weight:5),
a!gridLayoutColumnConfig(width:"DISTRIBUTE", weight:5),
a!gridLayoutColumnConfig(width:"DISTRIBUTE", weight:5),
},
rows: {
a!forEach(
items:ri!selectedProducts,
expression: a!gridRowLayout(
contents:{
a!textField(
value: if(a!isNullOrEmpty(fv!item.proposedName),{},fv!item.pId),
saveInto: fv!item.pId
),
a!pickerFieldCustom(
label: "Names",
instructions: "Enter the name.",
maxSelections: 1,
suggestFunction: rule!ucArrayPickerFilter(filter: _, labels: local!recordLabels, identifiers: local!recordLabels),
selectedLabels: a!forEach(
items: fv!item.proposedName,
expression: index(
local!recordLabels,
wherecontains(
touniformstring(fv!item),
touniformstring(local!recordLabels)
)
)
),
value: fv!item.proposedName,
saveInto: {
a!save(fv!item.proposedName, save!value),
a!save(local!products,rule!ACRA_GetProductsByName(pname:fv!item.proposedName)),
a!save(fv!item.pId, local!products.pId),
a!save(fv!item.status, local!products.status),
a!save(local!selItem,fv!item),
/*a!save(local!selIndex,*/
/*tointeger(wherecontains(*/
/*touniformstring(fv!item.proposedName), */
/*touniformstring(local!recordLabels)*/
/*))*/
/*),*/
/*a!save(local!recordLabels,remove(local!recordLabels,*/
/*tointeger(wherecontains(*/
/*touniformstring(fv!item.proposedName), */
/*touniformstring(local!recordLabels)*/
/*)))),*/
}
),
a!textField(
value: if(a!isNullOrEmpty(fv!item.proposedName),{},fv!item.status),
saveInto: fv!item.status
),

}
)
)
},
addRowLink: a!dynamicLink(
label:"Add Row",
saveInto: a!save(ri!selectedProducts,
append(ri!selectedProducts, local!newRow))
),
)
)