Program: 86625
Project: 86625
Buggy source:
@Override public void insert(DataAccess data) throws DatabaseWriteException {
  if (this.doesEntryExist(data)) {
    return;
  }
  Connection conn=pool.getConnectionFromPool();
  PreparedStatement ps=null;
  try {
    StringBuilder fields=new StringBuilder();
    StringBuilder values=new StringBuilder();
    HashMap<Column,Object> columns=data.toDatabaseEntryList();
    Iterator<Column> it=columns.keySet().iterator();
    Column column=null;
    while (it.hasNext()) {
      column=it.next();
      if (!column.autoIncrement()) {
        fields.append("String_Node_Str").append(column.columnName()).append("String_Node_Str").append("String_Node_Str");
        ;
        values.append("String_Node_Str").append("String_Node_Str");
      }
    }
    if (fields.length() > 0) {
      fields.deleteCharAt(fields.length() - 1);
    }
    if (values.length() > 0) {
      values.deleteCharAt(values.length() - 1);
    }
    ps=conn.prepareStatement("String_Node_Str" + data.getName() + "String_Node_Str"+ fields.toString()+ "String_Node_Str"+ values.toString()+ "String_Node_Str");
    int i=1;
    for (    Column c : columns.keySet()) {
      if (!c.autoIncrement()) {
        if (column.isList()) {
          ps.setObject(i,this.getString((List<?>)columns.get(column)));
        }
        ps.setObject(i,this.convert(columns.get(c)));
        i++;
      }
    }
    if (ps.executeUpdate() == 0) {
      throw new DatabaseWriteException("String_Node_Str");
    }
  }
 catch (  SQLException ex) {
    Canary.logStacktrace(ex.getMessage(),ex);
  }
catch (  DatabaseTableInconsistencyException dtie) {
    Canary.logStacktrace(dtie.getMessage(),dtie);
  }
 finally {
    this.closePS(ps);
    pool.returnConnectionToPool(conn);
  }
}

Fixed version (ground truth):
@Override public void insert(DataAccess data) throws DatabaseWriteException {
  if (this.doesEntryExist(data)) {
    return;
  }
  Connection conn=pool.getConnectionFromPool();
  PreparedStatement ps=null;
  try {
    StringBuilder fields=new StringBuilder();
    StringBuilder values=new StringBuilder();
    HashMap<Column,Object> columns=data.toDatabaseEntryList();
    Iterator<Column> it=columns.keySet().iterator();
    Column column;
    while (it.hasNext()) {
      column=it.next();
      if (!column.autoIncrement()) {
        fields.append("String_Node_Str").append(column.columnName()).append("String_Node_Str").append("String_Node_Str");
        ;
        values.append("String_Node_Str").append("String_Node_Str");
      }
    }
    if (fields.length() > 0) {
      fields.deleteCharAt(fields.length() - 1);
    }
    if (values.length() > 0) {
      values.deleteCharAt(values.length() - 1);
    }
    ps=conn.prepareStatement("String_Node_Str" + data.getName() + "String_Node_Str"+ fields.toString()+ "String_Node_Str"+ values.toString()+ "String_Node_Str");
    int i=1;
    for (    Column c : columns.keySet()) {
      if (!c.autoIncrement()) {
        if (c.isList()) {
          ps.setObject(i,this.getString((List<?>)columns.get(c)));
        }
        ps.setObject(i,this.convert(columns.get(c)));
        i++;
      }
    }
    if (ps.executeUpdate() == 0) {
      throw new DatabaseWriteException("String_Node_Str");
    }
  }
 catch (  SQLException ex) {
    Canary.logStacktrace(ex.getMessage(),ex);
  }
catch (  DatabaseTableInconsistencyException dtie) {
    Canary.logStacktrace(dtie.getMessage(),dtie);
  }
 finally {
    this.closePS(ps);
    pool.returnConnectionToPool(conn);
  }
}