Firestore storing partial data to document - reactjs

Question

I have a issue with data saving to Firestore. I'm passing a list of url's to be saved to the document.
data sent in the following format
But it saving only the first data
firestore data
what may be issue? Please help.
update button click handler
handleUpdate=()=>{
const promises = [];
let files=[];
const {fileURLs,sp_License,sp_PilotsLicense}=this.state;
let err = this.validate();
if (!err) {
this.setState({ loading: true,disChecked:false })
// const Lfilename = this.state.sp_Name + '_' + new Date().getTime();
// const uploadTask = storage.ref('License/' + Lfilename).put(sp_License);
let orgFile='';
const promise1=this.uploadTaskPromise().then((res)=>{
console.log(res)
orgFile=res
});
promises.push(promise1)
console.log(orgFile)
//promises.push(this.uploadTaskPromiseMulti());
const promise2=this.uploadTaskPromiseMulti().then((res)=>{
console.log(res)
files=res
});
promises.push(promise2)
console.log(promise2)
Promise.all(promises).then(tasks => {
console.log('all uploads complete');
console.log(this.state)
if(this._mounted)
{
//this.saveData();
//console.log(orgFile.data)
this.setState({
fileURLs: files, -- here fileurls gets updated
sp_License:orgFile,
},()=>{
console.log(this.state)
this.saveData();
});
}
});
}
}
code of saveData method - I'm using react redux firebase method for saving data
saveData=()=>{
let uid = this.props.auth.uid;
let keysToRemove = ["loading", "checked", "disChecked", "open", "message",
"sp_NameError", "sp_PhoneError", "sp_emailError", 'usr_org_LicenseNumberError',
'sp_LicenseError','usr_org_StateConveredError','usr_org_DistConveredError',
'sp_NumberofEquipmentsError','sp_NumberofDronePilotsError','sp_PilotsLicense',
'sp_NumberofEquipmentsOwnedError','sp_ToolError','processingToolServiceError',
'processingToolDomainError','modalopen','EquipmentCount',
'PilotsCount','buttonName','isReady','redirect']
let newState = Object.entries({...this.state}).reduce((obj, [key, value]) => {
if(!keysToRemove.includes(key)){
obj[key] = value
}
return obj
}, {})
console.log(newState)
this.props.UpdateUserDetails(uid, newState,this.successMessage)
}
Action code
export const UpdateUserDetails= (id, droneSPDetails,func) => {
return (dispatch, getState, { getFirestore }) => {
const firestore = getFirestore()
firestore.collection('web_Users')
.doc(id)
.set({
...droneSPDetails,
sp_UpdatedOn: new Date(),
//sp_Status:"pending",
sp_ActiveFlag:"1",
},{ merge: true })
.then(() => {
func();
dispatch({ type: 'CREATE_DRONESP', droneSPDetails });
})
.catch((error) => {
console.error("Error adding document: ", error);
});
}
}