avoid overwriting contacts at fetching

app/src/main/kotlin/com/simplemobiletools/contacts/pro/helpers/ContactsHelper.kt

@@ -178,8 +178,10 @@ class ContactsHelper(val context: Context) {
             val contact = Contact(id, prefix, firstName, middleName, surname, suffix, nickname, photoUri, numbers, emails, addresses,
                 events, accountName, starred, contactId, thumbnailUri, null, notes, groups, organization, websites, ims)
 
+            if (contacts[id] == null) {
                 contacts.put(id, contact)
             }
+        }
 
         val phoneNumbers = getPhoneNumbers(null)
         var size = phoneNumbers.size()