Bug: Adding a product consisting of a kit to a kit causes fatal error in php 8.2 and only warning in php 7.4

[kupfair]

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Bug

[Short description]

Environment

• Version: 18.0.2
• OS: Linux
• Web server: Apache
• PHP: fpm-fcgi 8.2.9
• Database: MySQL or MariaDB 10.4.25-MariaDB-1:10.4.25+maria~stretch-log
• URL(s): /product/composition/card.php?id=4096

Expected and actual behavior

Our products consist of kits of kits. However, adding kits to kits sometimes causes a fatal error (php 8.2) or at least warnings (php 7.4) [Verbose description]

Steps to reproduce the behavior

[Verbose description]

Attached files (Screenshots, screencasts, dolibarr.log, debugging informations…)

[Files]

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