This is a regression in 1.3 as it was fixed in 1.2 by @dragonstyle already https://github.com/quarto-dev/quarto-cli/issues/2393

* References.bib
```
@article{Cronbach_1951,
	doi = {10.1007/bf02310555},
	year = 1951,
	month = {sep},
	publisher = {Springer Science and Business Media {LLC}},
	vol = {16},
	number = {3},
	pages = {297--334},
	author = {Lee J. Cronbach},
	title = {Coefficient alpha and the internal structure of tests},
	journal = {Psychometrika}
}
```

```markdown
---
title: "Citeproc"
format: html
bibliography: References.bib
citeproc: true
---

Hello [@Cronbach_1951]
```
![image](https://github.com/quarto-dev/quarto-cli/assets/6791940/c0e737af-9416-43e6-8207-36407b5d0c2c)


We have a code path where `citeproc: true` should be removed : 
https://github.com/quarto-dev/quarto-cli/blob/e136ef277275a9ad9d4ff4599b04595c34c4f4ef/src/command/render/filters.ts#L619-L624

but it seems to still be present in the default file we generate.

This is happening with current release 1.3 and pre release 1.4. 

So This is a regression we should probably patch for 1.3 and fix for 1.4 - this is needed to work for #5575 as we set `citeproc: false` by default, and we need user to set `citeproc: true` to change the engine. 
cderv
2023-05-17T19:26:38Z
cderv
regression citations
Hot-fix
closed
Bibliography repeated twice when using citeproc explicitely
https://github.com/quarto-dev/quarto-cli/issues/5585