---
title: Valid from timestamp mapped without effect (Business Rule)
description: These business rules warn when BG_ValidFromTimestamp is mapped on a Store Entity or an Entity where the mapping has no effect.
---

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# Valid from timestamp mapped without effect (Business Rule)

**Applies to**  
Platform: Microsoft SQL Server · Snowflake · Databricks · Fabric Lakehouse · Fabric Warehouse · Oracle  
Architecture: Data Store · Dimensional

These business rules warn when `BG_ValidFromTimestamp` is mapped on a Store Entity or an Entity where the mapping has no effect. Both rules raise a warning, and generation continues: ID-10057 when the model object is not historized, and ID-10058 when it uses a multi-version load.

### Messages

Each message names the model object and its type in place of `<model object name>` and `<type>`. The Generate Artifacts page lists the messages without the rule ID.

#### Model object is not historized

The client shows a warning with this text:

```
Model object '<model object name>' of type '<type>' has valid from
timestamp (BG_ValidFromTimestamp) mapped but is not historized.
Without historization the mapping will have no effect.
```

On the model object card, point to the warning icon to see this message with the rule ID: Warning ID-10057.

Cause: `BG_ValidFromTimestamp` has an expression or a default value in a dataflow set, while no relationship and no term has Historization Type SCD2. Business keys, identities and Default Terms are not counted. The rule checks Store Entity and Entity.  
Fix: clear the mapping of `BG_ValidFromTimestamp`, or set Historization Type SCD2 on the terms or relationships that keep history.

#### Model object uses a multi-version load

The client shows a warning with this text:

```
Model object '<model object name>' of type '<type>' has valid from
timestamp (BG_ValidFromTimestamp) mapped and has Multi Version Load
configured. With active Multi Version Load the mapping will have no
effect, and instead the configured version valid from timestamp will
be used.
```

On the model object card, point to the warning icon to see this message with the rule ID: Warning ID-10058.

Cause: `BG_ValidFromTimestamp` is mapped, and a source model object of a dataflow set has a Version Valid From Term, which switches on the multi-version load. The rule checks Store Entity.  
Fix: clear the mapping of `BG_ValidFromTimestamp`. The load takes the valid-from value from the Version Valid From Term.

Available since Generator 2.2.

### Check the result

The warning icon is gone from the model object.

### Example

In a Dimensional project on Microsoft SQL Server, the Entity `common_customer_scd1` has only SCD1 terms. Its `BG_ValidFromTimestamp` is mapped to `CAST('2020-01-01' AS DATETIME2)`. The client shows:

```
Model object 'common_customer_scd1' of type 'Entity' has valid from
timestamp (BG_ValidFromTimestamp) mapped but is not historized.
Without historization the mapping will have no effect.
```

### Related articles

- Reference: [BG\_ValidFromTimestamp](https://knowledge.bigenius-x.com/bg_validfromtimestamp?hsLang=en), [Version Valid From Term (Dataflow Model Object)](https://knowledge.bigenius-x.com/version-valid-from-term-dataflow-model-object?hsLang=en), [Historization Type (Term and Relationship)](https://knowledge.bigenius-x.com/historization-type-term-and-relationship?hsLang=en)
- See also: [Configure a multi-version load](https://knowledge.bigenius-x.com/configure-a-multi-version-load?hsLang=en), [Understand warnings and errors](https://knowledge.bigenius-x.com/understand-warnings-and-errors?hsLang=en)

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