Remove duplicates based on condition

I am trying to remove duplicates from my xml based on a condition in XSLT1.0

Here is the input xml.

<?xml version="1.0" encoding="UTF-8"?>
<Envelope
    xmlns="http://schemas.microsoft.com/dynamics/2011/01/documents/Message">
    <Header>
        <MessageId>{D5B72T7A-58E0-4930-9CEB-A06RT56AR21B0}</MessageId>
        <Action>http://tempuri.org/TRH_FinalQueryService/find</Action>
    </Header>
    <Body>
        <MessageParts
            xmlns="http://schemas.microsoft.com/dynamics/2011/01/documents/Message">
            <TRH_FinalQuery
                xmlns="http://schemas.microsoft.com/dynamics/2008/01/documents/TRH_FinalQuery">
                <TRH_UnionView class="entity">
                    <Company>1</Company>
                    <CS/>
                    <Text_1>1</Text_1>
                    <Text_2>Lotion</Text_2>
                    <WS/>
                </TRH_UnionView>
                <TRH_UnionView class="entity">
                    <Company>1</Company>
                    <CS>1</CS>
                    <Text_1>1</Text_1>
                    <Text_2>Soap</Text_2>
                    <WS>6</WS>
                </TRH_UnionView>
                <TRH_UnionView class="entity">
                    <Company>2</Company>
                    <CS/>
                    <Text_1>5</Text_1>
                    <Text_2>Shampoo</Text_2>
                    <WS/>
                </TRH_UnionView>
                   <TRH_UnionView class="entity">
                    <Company>2</Company>
                    <CS/>
                    <Text_1>5</Text_1>
                    <Text_2>Shampoo</Text_2>
                    <WS/>
                </TRH_UnionView>
                   </TRH_FinalQuery>
        </MessageParts>
    </Body>
</Envelope>

Here is the xslt that I have applied.

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:m="http://schemas.microsoft.com/dynamics/2011/01/documents/Message" xmlns:r="http://schemas.microsoft.com/dynamics/2008/01/documents/TRH_FinalQuery" exclude-result-prefixes="m r">
  <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes" />
  <xsl:strip-space elements="*" />
  <xsl:key name="r:TRH_FinalQuery" match="r:TRH_FinalQuery" use="concat(r:Text_1, '|', r:Company)" />
  <!-- move all elements to no namespace -->
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="r:TRH_FinalQuery[r:TRH_UnionView[@class='entity']/r:WessexCostCenter=''][key('r:TRH_FinalQuery',concat(r:Text_1, '|', r:Company))[1]]"/>
  <xsl:template match="*">
    <xsl:element name="{local-name()}">
      <xsl:copy-of select="@*" />
      <xsl:apply-templates />
    </xsl:element>
  </xsl:template>
  <!-- removes Envelope -->
  <xsl:template match="m:Envelope">
    <xsl:apply-templates />
  </xsl:template>
  <!-- removes Header,MessageId,Action and Body -->
  <xsl:template match="m:*">
    <xsl:apply-templates select="*" />
  </xsl:template>
  <!-- rename MessageParts to Document + skip the Run wrapper -->
  <xsl:template match="m:MessageParts">
    <DocumentElement>
      <xsl:apply-templates select="r:TRH_FinalQuery/*" />
    </DocumentElement>
  </xsl:template>
  <!-- rename RunObject to Item -->
  <xsl:template match="r:TRH_UnionView[@class='entity']">
    <xsl:choose>
      <xsl:when test="r:WS!=''">

        <Item>
          <Text_1>
            <xsl:value-of select="r:WS" />
          </Text_1>
          <Text_2>WS BodayWash</Text_2>
          <Company>
            <xsl:value-of select="r:Text_1" />
          </Company>
        </Item>
        <Item>
          <Text_1>
            <xsl:value-of select="r:WS" />
          </Text_1>
          <Text_2>WS BodayWash</Text_2>
          <Company>0123</Company>
        </Item>

      </xsl:when>

      <xsl:otherwise>

        <Item>

          <xsl:apply-templates select="r:Text_1" />
          <xsl:apply-templates select="r:Text_2" />
          <xsl:apply-templates select="r:Company" />
        </Item>
        <Item>
          <xsl:apply-templates select="r:Text_1" />
          <xsl:apply-templates select="r:Text_2" />
          <Company>0123</Company>
        </Item>

      </xsl:otherwise>

    </xsl:choose>

  </xsl:template>
</xsl:stylesheet>

Below is the output I am getting

<?xml version="1.0" encoding="utf-8"?>
<DocumentElement>
  <Item>
    <Text_1>1</Text_1>
    <Text_2>Lotion</Text_2>
    <Company>1</Company>
  </Item>
  <Item>
    <Text_1>1</Text_1>
    <Text_2>Lotion</Text_2>
    <Company>0123</Company>
  </Item>
  <Item>
    <Text_1>6</Text_1>
    <Text_2>WS BodayWash</Text_2>
    <Company>1</Company>
  </Item>
  <Item>
    <Text_1>6</Text_1>
    <Text_2>WS BodayWash</Text_2>
    <Company>0123</Company>
  </Item>
  <Item>
    <Text_1>5</Text_1>
    <Text_2>Shampoo</Text_2>
    <Company>2</Company>
  </Item>
  <Item>
    <Text_1>5</Text_1>
    <Text_2>Shampoo</Text_2>
    <Company>0123</Company>
  </Item>
</DocumentElement>

Below is the expected output

<?xml version="1.0" encoding="utf-8"?>
<DocumentElement>
  <Item>
    <Text_1>6</Text_1>
    <Text_2>WS BodayWash</Text_2>
    <Company>1</Company>
  </Item>
  <Item>
    <Text_1>6</Text_1>
    <Text_2>WS BodayWash</Text_2>
    <Company>0123</Company>
  </Item>
  <Item>
    <Text_1>5</Text_1>
    <Text_2>Shampoo</Text_2>
    <Company>2</Company>
  </Item>
  <Item>
    <Text_1>5</Text_1>
    <Text_2>Shampoo</Text_2>
    <Company>0123</Company>
  </Item>
</DocumentElement>

I am trying to remove all duplicates based on condition

1. If the Text_1 and Company are same.

2. If the point 1 is true then retain all records having value in WS tag and remove records where there no value in WS tag.

Can you please suggest what I am doing wrong