---
title: Timeslot Conflicts When Activating Lessons
description: Understanding and Resolving Schedule Overlaps in Class Manager
---

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# Timeslot Conflicts When Activating Lessons

## Understanding and Resolving Schedule Overlaps in Class Manager

When attempting to activate lessons, you may encounter the following error message:  
**"Some classes couldn't be made active because they have timeslot conflicts."**  
This means that the system has detected an overlap in scheduled class times and locations.

### What Causes This Error?

Class Manager prevents multiple classes from being scheduled in the same room at the same time to avoid conflicts. This error typically occurs when:

- Two or more classes are assigned to the same room and have overlapping times.
- A class is mistakenly scheduled for a time slot already occupied by another class in the same room.

### How to Resolve Timeslot Conflicts

To resolve this issue, follow these steps:

#### 1. Check the Class Schedule

- Navigate to `Classes` \> `View All`.
- Select the relevant season and locate the class with the error.
- Review the assigned room and timeslot for conflicts.

#### 2. Adjust the Class Schedule or Room Assignment

- If another class is scheduled at the same time in the same room, consider:
  
    - Assigning the conflicting class to a different **time**.
      
          - Open the class and navigate to the `Lesson Setup` tab.
          - Select the existing setup to change the timeframe and `Save` your changes.
    - Moving the class to a different **room**.
      
          - Open the class and under the `Basic Information` tab click `Edit`.
          - Select a new room then `Save`.
          - Navigate to the `Lesson Setup` tab.
          - Select the lesson to change the room and `Save` your changes.

#### 3. Create an Additional Room (If Needed)

If all available rooms are occupied, you may need to create a new room to accommodate the schedule:

- Go to `Settings` \> `Venues` **\>** `View All`.
- Select your venue.
- Navigate to the `Rooms` tab.
- Click `Create` and enter the details.
- Assign one of the conflicting classes to the new room by following the steps [above](https://help.classmanager.com/timeslot-conflicts-when-activating-lessons#move-to-a-new-room).

Once adjustments are made, try activating the lessons again. Ensuring each class has a unique timeslot and location will prevent this issue from recurring.

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