"Main_Text + Body" etc. would indicate a style plus direct formatting, not a new style.

In the affected document, you can click the Options link in the Styles pane (Ctrl+Alt+Shift+S). In the Style Pane Options dialog box, clear all options under "Select formatting to show as styles." See screen shot.

Attached Images

StylePaneOptions.PNG (55.8 KB, 15 views)

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Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional