Solr 8.0.0 Indexing but not Adding

[Anuj Bhargava]

While doing full import, getting the following error - Indexing but not
Adding/Upldating

{
  "responseHeader":{
    "status":0,
    "QTime":2},
  "initArgs":[
    "defaults",[
      "config","db-data-config.xml"]],
  "command":"full-import",
  "status":"idle",
  "importResponse":"",
  "statusMessages":{
    "Total Requests made to DataSource":"1",
    "Total Rows Fetched":"800",
    "Total Documents Processed":"0",
    "Total Documents Skipped":"0",
    "Full Dump Started":"2019-04-06 13:30:08",*    "":"Indexing
completed. Added/Updated: 0 documents. Deleted 0 documents.",*
    "Committed":"2019-04-06 13:30:11",
    "Total Documents Failed":"800",
    "Time taken":"0:0:2.457"}}