Hi @UPT_PPJ,
The version of OJS that you’re using is no longer maintained or supported by PKP. I recommend that you upgrade to the newest version of OJS. However, other community members may wish to offer assistance with your question.
Other users have posted on the Forum about making specific fields mandatory in OJS 3.x. You may find answers by looking at these posts, ie Affiliation mandatory, OJS 3.0.1.0 - #12 by vvucic and [OJS 3.3.0.7] Make fields mandatory, display the * sign and understand why translation value is not being used in mandatory field warning
You may find the following resources helpful in preparing for and performing the upgrade:
These resources will introduce you to OJS 3 and how it is different from OJS 2:
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Setting up a Journal and Editorial Workflow video tutorials in PKP School
You may need to seek professional support to upgrade your installation. This can usually be acquired from the service provider that hosts or maintains your software, such as the technical support team at your institution or a third-party hosting provider.
If you are unable to get the support you need from your service provider, we recommend you consider exploring alternative providers. Publishing support services may exist in your institution that can help you identify sources of help. Or you can seek support from commercial service providers, such as PKP Publishing Services