--- title: Mixed historization types (Business Rule) description: This business rule warns when the terms and relationships of a model object use more than one historization type, for example SCD1 and SCD2. --- [Skip to content](https://knowledge.bigenius-x.com/mixed-historization-types-business-rule#main-content) [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new?hsLang=en) [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal?hsLang=en) [![TRI\_Logo\_biGENIUS\_2020\_RGB\_s](https://knowledge.bigenius-x.com/hs-fs/hubfs/Marketing/TRI_Logo_biGENIUS_2020_RGB_s.png?width=150&height=42&name=TRI_Logo_biGENIUS_2020_RGB_s.png)](https://www.bigenius-x.com/) Open main navigation Close main navigation - [Contact us](https://knowledge.bigenius-x.com/kb-tickets/new) - [Go to Customer Portal](https://knowledge.bigenius-x.com/customer-portal) How can we help you? - There are no suggestions because the search field is empty. 1. [biGENIUS-X Knowledge Base](https://knowledge.bigenius-x.com/?hsLang=en) 2. [Best practices](https://knowledge.bigenius-x.com/best-practices?hsLang=en) 3. [Business Rules](https://knowledge.bigenius-x.com/best-practices?hsLang=en#business-rules) # Mixed historization types (Business Rule) **Applies to** Platform: Microsoft SQL Server · Snowflake · Databricks · Databricks dbt · Fabric Lakehouse · Fabric Warehouse · Oracle Architecture: Data Store · Dimensional · Data Mart This business rule warns when the terms and relationships of a model object use more than one historization type, for example SCD1 and SCD2. It raises a warning, and generation continues. The rule ID is ID-10059. ### Message The client shows a warning with this text on the model object. `` and `` stand for its name and type. ``` Model object '' of type '' uses mixed historization types. This will work fine, but could be misleading when using the data. Make sure to properly indicate the historization types with clear naming, documentation and guidance. ``` On the model object card, point to the warning icon to see this message with the rule ID: Warning ID-10059. The Generate Artifacts page lists the message without the ID. Available since Generator 2.2. ### Cause The terms and relationships of the model object together carry more than one Historization Type. Every term and relationship that has a historization type counts. The rule checks Store Entity, Entity and Mart Dimension. ### Fix The model object is generated as configured. Decide which case applies: - The mix is intended: keep it, and name or document the columns so that users of the data see which ones keep history. The warning stays. - The mix is not intended: set the same Historization Type on all terms and relationships, see [Manage Historization Types](https://knowledge.bigenius-x.com/manage-historization-types?hsLang=en). ### Check the result With one historization type, the warning icon is gone from the model object. ### Example In a Dimensional project on Microsoft SQL Server, the Entity `scd_mixed` has the terms `SUPPLIER_ID` with SCD0, `FOOD_ID` with SCD1 and `SALES_PRICE` with SCD2. The client shows: ``` Model object 'scd_mixed' of type 'Entity' uses mixed historization types. This will work fine, but could be misleading when using the data. Make sure to properly indicate the historization types with clear naming, documentation and guidance. ``` ### Related articles - Reference: [Historization Type (Term and Relationship)](https://knowledge.bigenius-x.com/historization-type-term-and-relationship?hsLang=en) - See also: [Manage Historization Types](https://knowledge.bigenius-x.com/manage-historization-types?hsLang=en), [Change detection and historization](https://knowledge.bigenius-x.com/change-detection-and-historization?hsLang=en), [Understand warnings and errors](https://knowledge.bigenius-x.com/understand-warnings-and-errors?hsLang=en) - [Getting started](https://knowledge.bigenius-x.com/getting-started?hsLang=en#main-content) - [Guidelines](https://knowledge.bigenius-x.com/getting-started?hsLang=en#guidelines) - [Start working](https://knowledge.bigenius-x.com/getting-started?hsLang=en#start-working) - [Account](https://knowledge.bigenius-x.com/getting-started?hsLang=en#account) - [General overview](https://knowledge.bigenius-x.com/general-overview?hsLang=en) - 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