If you look at your dialog.lsx file for that character, for the Troll/Guard option do you see something similiar to the following?


The actual keywordContentMapKey's and handles will be different, but the keywordContentMapValue and keywordDisplayText should be the same.
Code
<node id="keywordContentMap">
                    <attribute id="keywordContentMapKey" value="8d3441bf-eeba-4a1b-8f3e-04003d771ba3" type="22" />
                    <attribute id="keywordContentMapValue" value="What do you know about the guard over there?" handle="h52514e3bg6d0cg43b8g930bgf6ee21340dd8" type="28" />
                </node>


and later on in the file-
Code
 <attribute id="keywordDisplayedText" value="8d3441bf-eeba-4a1b-8f3e-04003d771ba3" type="22" />
                    <attribute id="keywordId" value="Guard" type="22" />


Note that the keywordDisplayedText value is the same as the keywordContentMapKey defined earlier in the file.