---
title: "Aligning Analytics reports with historical data"
slug: "explainer-aligning-analytics-reports-with-historical-data"
updated: 2026-03-30T12:35:01Z
published: 2026-03-30T12:35:01Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.gong.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Aligning Analytics reports with historical data

> **Who can use this**: Any team member
> 
> **Available on**: Gong Forecast
> 
> **Ideal for**: Sales rep, Sales manager, Manager of managers

> **Where to go:**Revenue > Forecast

This article explains how to initiate a data backfill process to align your Analytics reports with changes made to your data. The service ingests field history change data from up to 5 quarters into the [Trends](/v1/docs/analyze-monitor-forecast-trends) (including Projection), [Changes](/v1/docs/analyze-forecast-category-changes), and [Pacing](/v1/docs/analyze-see-how-youre-pacing) (including Pipeline needed).

## Who's this for?

Existing Gong Forecast customers with up to 5 quarters of Gong data.

> [!NOTE]
> Note:
> 
> If your company is new to Gong Forecast and wishes to ingest historical CRM data into Gong, contact your CSM.

> [!NOTE]
> **Note:**
> 
> Historical data backfill isn’t supported for HubSpot integrations.

## When do I need historical data backfill?

You may need historical data backfill if:

- You've updated your [business line](/v1/docs/set-up-forecast-boards), either by changing the data/amount/owner CRM fields or by changing your Forecast categories.
- You've created a new business line.

> [!NOTE]
> Note:
> 
> Without historical data backfill, new reports won't display any historical data, and existing reports will display mixed data: information shown up to the time of change will be calculated according to the past CRM field configuration, and information shown after the change will be calculated according to the new CRM field configuration.

## How do I initiate a data backfill process?

A self-serve backfill service will be released soon. In the meantime, backfill is performed upon request.

To request historical data backfill:

1. Make sure your CRM/Forecast category changes are complete and have been validated by all relevant stakeholders in your company.
2. Reach out to your CSM to validate the data (up to 5 quarters) and initiate the backfill process.
3. Once we initiate the backfill process, you should be able to see the updated reports within 3-5 business days.

Any team member can access this feature if they have the required permissions.

Gong’s full Forecast package for next-level forecasting and revenue optimization. Access to features depends on your [company’s plan and your assigned seat](/v1/docs/plans-and-seats).

A quota-carrying sales representative who manages client relationships. Reps can be Account executives (AEs) or Sales Development Representatives (SDRs).

A team member who manages a team of sales reps.

A leader who oversees multiple sales managers.