Index: /trunk/src/org/openstreetmap/josm/data/validation/OsmValidator.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/validation/OsmValidator.java	(revision 16446)
+++ /trunk/src/org/openstreetmap/josm/data/validation/OsmValidator.java	(revision 16447)
@@ -294,5 +294,4 @@
      */
     static void cleanupIgnoredErrors() {
-        cleanup3000();
         if (ignoredErrors.size() > 1) {
             List<String> toRemove = new ArrayList<>();
@@ -316,10 +315,4 @@
             ignoredErrors.putAll(tmap);
         }
-    }
-
-    private static void cleanup3000() {
-        // see #19053
-        ignoredErrors.entrySet()
-                .removeIf(e -> e.getKey().equals("3000_" + e.getValue()));
     }
 
Index: /trunk/test/unit/org/openstreetmap/josm/data/validation/OsmValidatorTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/validation/OsmValidatorTest.java	(revision 16446)
+++ /trunk/test/unit/org/openstreetmap/josm/data/validation/OsmValidatorTest.java	(revision 16447)
@@ -2,10 +2,7 @@
 package org.openstreetmap.josm.data.validation;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
-
-import java.util.Collections;
 
 import org.junit.Before;
@@ -90,15 +87,4 @@
 
     /**
-     * Non-regression test for <a href="https://josm.openstreetmap.de/ticket/19053">Bug #19053</a>.
-     * {@link OsmValidator#cleanupIgnoredErrors()} must not combine primitives.
-     */
-    @Test
-    public void testCleanupIgnoredErrorsTicket19053() {
-        OsmValidator.addIgnoredError("3000_missing tag", "missing tag");
-        OsmValidator.cleanupIgnoredErrors();
-        assertEquals(Collections.emptyMap(), OsmValidator.getIgnoredErrors());
-    }
-
-    /**
      * Test that tests are really removed, and that core tests cannot be removed
      */