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@@ -238,7 +238,7 @@ public abstract class TbAbstractDataSubCtx<T extends AbstractDataQuery<? extends | @@ -238,7 +238,7 @@ public abstract class TbAbstractDataSubCtx<T extends AbstractDataQuery<? extends | ||
238 | private String lastUpdateValue; | 238 | private String lastUpdateValue; |
239 | 239 | ||
240 | boolean updateValue(TsValue value) { | 240 | boolean updateValue(TsValue value) { |
241 | - if (value.getTs() > lastUpdateTs && !lastUpdateValue.equals(value.getValue())) { | 241 | + if (value.getTs() > lastUpdateTs && (lastUpdateValue == null || !lastUpdateValue.equals(value.getValue()))) { |
242 | this.lastUpdateTs = value.getTs(); | 242 | this.lastUpdateTs = value.getTs(); |
243 | this.lastUpdateValue = value.getValue(); | 243 | this.lastUpdateValue = value.getValue(); |
244 | return true; | 244 | return true; |