#254 Pr1 field repetition with Terser

[SWAROOP CHAKRABORTY]

Hi, I am trying to add field repetition for PR1 segment using a terser.set but it throws me error:
"Can't create repetition #1 of Structure PR1 - this Structure is non-repeating so only rep 0 may be retrieved"

The below is my HL7 message with 4 PR1 segments and all I want is to insert values to each PR1 segment field's components using terser.

MSH|^~\&#|||||20200301114708.448+0530||ADT^A01^ADT_A01|106701|P|2.8.1
OBX||||||||||||||||^78
OBX||||||||||||||||^78~^800|^908
OBX||^^908
PR1|654^^^654~^^^654||^^^^^654^654|^^^^^^654
PR1|1
PR1|2
PR1|3

In this case, it will insert values to the zeroth PR1 segment using terser.
This works:
terser.set("/.PR1(0)-3-6", "654");
terser.set("/.PR1(0)-3-7", "654");
terser.set("/.PR1(0)-4-7", "654");
terser.set("/.PR1(0)-1-1", "654");
terser.set("/.PR1(0)-1-4", "654");
terser.set("/.PR1(0)-1(1)-4", "654");

     but this does not,
     terser.set("/.PR1(1)-1-4", "654");

     Please help me fix this.
     -----------------------------------
 Full CODE:
 ADT_A01 adt= new ADT_A01();
    adt.initQuickstart("ADT", "A01", "P");
//  adt.insertPROCEDURE(1).
    for(int i =0; i<4;i++)
    {
        ca.uhn.hl7v2.model.v281.segment.PR1 obj = adt.getPROCEDURE(i).getPR1();
        obj.getPr11_SetIDPR1().setValue(String.valueOf(i));

    }



    HapiContext context = new DefaultHapiContext();
    Parser parser = context.getPipeParser();
    String encodedMessage = parser.encode(adt);

    PipeParser pipeParser = new PipeParser();
    Message message = parser.parse(encodedMessage);
    Terser terser = new Terser(message);
    System.out.println(terser.toString());
     terser.set("/.OBX(0)-16-2", "78");
     terser.set("/.OBX(1)-16-2", "78");
     terser.set("/.OBX(1)-16(1)-2", "800");
     terser.set("/.OBX(1)-17-2", "908");
     terser.set("/.OBX(2)-2-3", "908");
     terser.set("/.PR1(0)-3-6", "654");
     terser.set("/.PR1(0)-3-7", "654");
     terser.set("/.PR1(0)-4-7", "654");
     terser.set("/.PR1(0)-1-1", "654");
     terser.set("/.PR1(0)-1-4", "654");
     terser.set("/.PR1(0)-1(1)-4", "654");
     terser.set("/.PR1(1)-1-4", "654");


    System.out.println("Printing ER7 Encoded Message:");
    System.out.println(message.encode());