title: Hi I am new to Neo4j, I am getting error with cartesian product
body: <p>I am getting error with cartesian product. like I am trying to create a relationship, But it does-not allow me to create relationship instead it says no changes. I am not able to create create relationships how can I solve this issue?</p>
  <p>*<em><strong><strong><strong><strong><strong>Here is my code</strong></strong></strong></strong></strong></em></p>
  <pre><code>MATCH
    (a:Neuron),
    (b:Structure)
  WHERE a.doi = &quot;10.1126/science.aah511477&quot; AND a.local_id = 1 AND b.acronym = &quot;SSp-tr&quot;
  CREATE (a)-[r:BELONGS_TO]-&gt;(b);
  </code></pre>