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When I try to update composer, it will show some error. does anyone know how to solve it? i'm using Mac

$ composer update
Loading composer repositories with package information Updating dependencies Your requirements could not be resolved to an installable set of packages.

Problem 1 - acquia/blt[9.0.4, ..., 9.0.5] require composer-plugin-api ^1.0.0 -> found composer-plugin-api[2.1.0] but it does not match the constraint.
- acquia/blt[9.1.0, ..., 9.2.8] require composer-plugin-api ^1.1.0 -> found composer-plugin-api[2.1.0] but it does not match the constraint.
- Root composer.json requires acquia/blt ^9.0.4 -> satisfiable by acquia/blt[9.0.4, ..., 9.2.8].

Ryuichi
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  • Package acquia/blt in this version not compatible with composer v2. Downgrade composer to v1, update package to current version - then update composer again – Maksim Oct 31 '21 at 13:33
  • What have you tried to resolve the problem? Where are you stuck? `acquia/blt` in v9 is pretty old (last release in May 2019), so why not update it? – Nico Haase Oct 31 '21 at 13:35

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