java.lang.IllegalArgumentException: Replacements can not be multi

Question

I am using the following software and their versions:

• mongodb: 3.4.10
• spring-data-mongodb: 2.10.1.RELEASE
• mongodb java driver: 3.4.3
• spring boot: 1.5.10.RELEASE

MongoDB schema:

   {
        "_id" : ObjectId("some id"),
        "a":{/* Complex Structure */},
        "b": [/* Array of transaction records */], 
        "c": {/* Some additional 50 fields with mixture of various data types  */ }
   }
  
      

Java code: TransactionMap class is a java.util.HashMap

mongoTemplate.updateFirst(query, update, TransactionMap.class);

Exception traced:

java.lang.IllegalArgumentException: Replacements can not be multi

When will the above exception be thrown?