anchor-spl Upgrade to solana-program v2.0.0 Causes Compilation Errors (Anchor v0.30.1, Solana v1.18.17)

[lingcoder]

Problem

The anchor-spl package automatically upgraded the solana-program version to 2.0.0. This upgrade has led to a series of compilation errors in my current project.

My project is still dependent on Solana version 1.18.17 and I am using Anchor version 0.30.1.

Steps to Reproduce

1. Have a project dependent on solana 1.18.17.
2. Use anchor-spl package with Anchor version 0.30.1.
3. Notice that anchor-spl automatically upgrades solana-program to 2.0.0.
4. Experience compilation errors.

Proposed Solution

1. Investigate whether the anchor-spl package can maintain compatibility with solana 1.18.17.
2. Provide clear documentation or an approach to handle scenarios where such automatic upgrades lead to compatibility issues.
3. Possibly consider pinning or offering a version of anchor-spl that is compatible with older versions of Solana.

[acheroncrypto]

Thanks for creating the issue, but this is a duplicate of #3044, and the problem is not anchor-spl specific.