diff --git a/repair/templates/strategy/solution-parts.html b/repair/templates/strategy/solution-parts.html
index 98854254d..71ce3cf5a 100644
--- a/repair/templates/strategy/solution-parts.html
+++ b/repair/templates/strategy/solution-parts.html
@@ -695,8 +695,8 @@ <h4> {% trans "From which activity will the new flow originate from?" %} </h4>
 <br>
 <h4> {% trans "Mass of prepended flow in relation to existing flow" %} </h4>
 <div class="row">
-  <input type="radio" name="is-absolute" value="true" checked> {% trans "absolute change" %} <br>
-  <input type="radio" name="is-absolute" value="false"> {% trans "relative change" %} <br>
+  <input type="radio" name="is-absolute" value="true" disabled> {% trans "absolute change" %} <br>
+  <input type="radio" name="is-absolute" value="false" checked> {% trans "relative change" %} <br>
   <br>
   {% trans "Do you want to refer to a user question for calculating the mass?" %} <br>
   <input type="radio" name="has-question" value="true" checked> {% trans "yes" %}
@@ -829,8 +829,8 @@ <h4> {% trans "To which activity will the new flow go?" %} </h4>
 <br>
 <h4> {% trans "Mass of appended flow in relation to existing flow" %} </h4>
 <div class="row">
-  <input type="radio" name="is-absolute" value="true" checked> {% trans "absolute change" %} <br>
-  <input type="radio" name="is-absolute" value="false"> {% trans "relative change" %} <br>
+  <input type="radio" name="is-absolute" value="true" disabled> {% trans "absolute change" %} <br>
+  <input type="radio" name="is-absolute" value="false" checked> {% trans "relative change" %} <br>
   <br>
   {% trans "Do you want to refer to a user question for calculating the mass?" %} <br>
   <input type="radio" name="has-question" value="true" checked> {% trans "yes" %}