Index: branches/5.3.x/core/install/upgrades.sql
===================================================================
diff -u -N -r15578 -r15584
--- branches/5.3.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 15578)
+++ branches/5.3.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 15584)
@@ -2860,3 +2860,19 @@
 # ===== v 5.3.0-B1 =====
 ALTER TABLE ScheduledTasks ADD Settings TEXT NULL;
 ALTER TABLE Themes ADD ImageResizeRules TEXT NULL;
+
+DELETE FROM UserPersistentSessionData WHERE VariableName = 'emailevents[Emails]columns_.';
+
+INSERT INTO <%TABLE_PREFIX%>SystemCache (VarName, Data)
+SELECT 'tmp_translation' AS VarName, l<%PRIMARY_LANGUAGE%>_Translation AS Data
+FROM <%TABLE_PREFIX%>LanguageLabels
+WHERE PhraseKey = 'LC_IMPORTLANG_PHRASEWARNING';
+
+UPDATE <%TABLE_PREFIX%>LanguageLabels
+SET
+	Phrase = 'la_fld_ImportOverwrite',
+	PhraseKey = 'LA_FLD_IMPORTOVERWRITE',
+	l<%PRIMARY_LANGUAGE%>_HintTranslation = (SELECT Data FROM <%TABLE_PREFIX%>SystemCache WHERE VarName = 'tmp_translation' LIMIT 1)
+WHERE PhraseKey = 'LA_PROMPT_OVERWRITEPHRASES';
+
+DELETE FROM LanguageLabels WHERE PhraseKey = 'LC_IMPORTLANG_PHRASEWARNING';