title: DB2 is_autoincrement and primary key issue
body: <p>Good day,</p>
  
  <p>I have a table, which some columns, and <code>BELTID</code> set to primary key, and <code>IS_AUTOINCREMENT</code> set to <code>YES</code>.</p>
  
  <p>I wish to insert a row of data inside this data without key in the BELTID, I am expect the BELDID will auto generate.</p>
  
  <p>The query is as follow:</p>
  
  <pre><code>INSERT INTO mySchema.TABLE1(TYPE, ORIGINALBATCHID, MANUAL) 
  VALUES ('TEST',  124,  1);
  </code></pre>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>SQLSTATE: 23505. A violation of the constraint imposed by a unique index or a unique constraint occurred.</p>
  </blockquote>
  
  <p>Then I change my query to:</p>
  
  <pre><code>INSERT INTO mySchema.TABLE1(BELTID, TYPE, ORIGINALBATCHID, MANUAL) 
  VALUES (123, 'TEST',  124,  1);
  </code></pre>
  
  <p>And I am getting another error:</p>
  
  <blockquote>
    <p>SQLSTATE: 428C9 A ROWID column cannot be specified as the target column of an INSERT or UPDATE.</p>
  </blockquote>
  
  <p>Kindly advise on what mistake I make.</p>