Tentando rowspan

server/services/eventos.js

@@ -19,9 +19,11 @@ _out.println('<div style="display: flex; justify-content: center; margin-top: 80
                 _out.println('<th>Categoria</th>')
             _out.println('</tr>')
             
+            const copiaDbRecords = dbRecords.slice()
+
             for (const dbRecord of dbRecords) {
 
-                 const cat = dbRecords.filter(r => r.getString("categoria") == dbRecord.getString("categoria"))
+                 const cat = copiaDbRecords.filter(r => r.getString("categoria") == dbRecord.getString("categoria"))
                     
                 _out.println('<tr style="height: 35px;">')
                     _out.println(`<td>${dbRecord.getString("titulo")}</td>`)