com.mongodb.MongoBulkWriteException: Bulk write operation error on server .
Write errors: [BulkWriteError{index=0, code=175, message='all indexes on collection dropped', details={ }}].
at com.mongodb.connection.BulkWriteBatchCombiner.getError(BulkWriteBatchCombiner.java:177)
at com.mongodb.connection.BulkWriteBatchCombiner.throwOnError(BulkWriteBatchCombiner.java:206)
at com.mongodb.connection.BulkWriteBatchCombiner.getResult(BulkWriteBatchCombiner.java:147)
at com.mongodb.operation.BulkWriteBatch.getResult(BulkWriteBatch.java:227)
at com.mongodb.operation.MixedBulkWriteOperation.executeBulkWriteBatch(MixedBulkWriteOperation.java:277)
at com.mongodb.operation.MixedBulkWriteOperation.access$700(MixedBulkWriteOperation.java:68)
at com.mongodb.operation.MixedBulkWriteOperation$1.call(MixedBulkWriteOperation.java:201)
at com.mongodb.operation.MixedBulkWriteOperation$1.call(MixedBulkWriteOperation.java:192)
at com.mongodb.operation.OperationHelper.withReleasableConnection(OperationHelper.java:424)
at com.mongodb.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:192)
at com.mongodb.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:67)
at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:193)
at com.mongodb.client.internal.MongoCollectionImpl.executeBulkWrite(MongoCollectionImpl.java:467)
at com.mongodb.client.internal.MongoCollectionImpl.bulkWrite(MongoCollectionImpl.java:447)