DB Migration fails with NumberFormatException

java.lang.IllegalArgumentException: can't parse argument number: 
	at java.text.MessageFormat.makeFormat(MessageFormat.java:1420) ~[na:1.7.0_07]
	at java.text.MessageFormat.applyPattern(MessageFormat.java:479) ~[na:1.7.0_07]
	at java.text.MessageFormat.<init>(MessageFormat.java:363) ~[na:1.7.0_07]
	at java.text.MessageFormat.format(MessageFormat.java:835) ~[na:1.7.0_07]
	at com.atlassian.stash.internal.i18n.PluginI18nService.getText(PluginI18nService.java:94) ~[stash-service-impl-2.8.2.jar:na]
	at com.atlassian.stash.internal.i18n.PluginI18nService.getText(PluginI18nService.java:85) ~[stash-service-impl-2.8.2.jar:na]
	at com.atlassian.stash.internal.i18n.PluginI18nService.getKeyedText(PluginI18nService.java:72) ~[stash-service-impl-2.8.2.jar:na]
	at com.atlassian.stash.internal.maintenance.restore.ActiveObjectsRestoreStep.run(ActiveObjectsRestoreStep.java:74) ~[stash-service-impl-2.8.2.jar:na]