---
title: "BigGantt 8.9.1 Release notes"
canonical: "https://support.appfire.com/space/DLP/297574202/BigGantt%208.9.1%20Release%20notes"
format: markdown
---
Release date: 2022-12-14

> Macro (auibutton)


> ⚠️ **Note**
> ⚠️ 
> ⚠️ **For rollback purposes**<span style="color: #333333">, please back up your database before starting the upgrade process or test the new BigPicture version on an isolated environment</span>

# Bug fixes

- Gantt Module/Resource panel - changing aggregation if Effort mode is set to Original estimate causes application freezes
- There are too much requests during set field value for one session - version 2
- ArrayIndexOutOfBoundsException on SchedulingUpgradeTaskMigrationV7#findFieldDefId
- Date picker displays invalid dates in most of the app, when the OS Time Zone is set to -5
- Error after upgrade BP from version 8.3.4 to 8.4.7

# Statistics

> Macro (div)
> 
> > Macro (legacy-content)
> 
> > Macro (legacy-content)


# Bug fixes list

> ℹ️ Use "Incognito mode" to open below tickets and find out the details.


> Macro (div)
> 
> > Macro (jira)

# Known issues

> Macro (jira)