Can't install `FlowTransactionScheduler`

[jribbink]

Problem

🔄 Processing dependency testnet://8c5303eaa26202d6.FlowTransactionScheduler...
🚫 A dependency named FungibleToken already exists with a different remote source. Please fix the conflict and retry.
jribbink@Jordans-MacBook-Pro cadence-chess % flow dependencies install testnet://8c5303eaa26202d6.FlowTransactionScheduler
🔄 Processing dependency testnet://8c5303eaa26202d6.FlowTransactionScheduler...
🚫 A dependency named FungibleToken already exists with a different remote source. Please fix the conflict and retry.
jribbink@Jordans-MacBook-Pro cadence-chess % flow deps install
🔄 Installing dependencies from flow.json...
🚫 A dependency named FungibleToken already exists with a different remote source. Please fix the conflict and retry.
jribbink@Jordans-MacBook-Pro cadence-chess % flow deps install
🔄 Installing dependencies from flow.json...
🚫 A dependency named FungibleToken already exists with a different remote source. Please fix the conflict and retry.

Steps to Reproduce

Existing project, with dependency sources pointing to mainnet (incl FungibleToken). Attempt to install FlowTransactionScheduler from testnet, but run into this conflict. Assuming that it's because of the mainnet/testnet mismatch.

Acceptance Criteria

I should be able to do this somehow, even if it's just a patch for the FlowTransactionScheduler case as this is only really relevant in the context of Forte.

Context

Trying to build with scheduled callbacks