FPM error during compilation

[GHNewbiee]

The following error suddenly displayed:

/opt/fpm/fpm build --profile "debug" (in directory: /home/.../projects/fortran/spas)
<ERROR>*cmd_build*:model error:Key test is not allowed in [build]
STOP 1
Compilation failed.

Version: 0.7.0, alpha

The content of fpm.toml file as follows (no changes and no dependencies update since the last time I successfully compiled the source):

# This is a TOML document

name = "..."

[build]
auto-examples = true
auto-executables = true
auto-tests = true
external-modules = ["_3rd_mod"]
link = []

[dependencies]
# plenty of dependencies

[dev-dependencies]
test-drive.git = "https://github.com/fortran-lang/test-drive"
test-drive.tag = "v0.4.0"

[install]
library = false

[extra]

I have installed 0.8.1. Now I get the following:

/opt/fpm/fpm build --profile "debug" (in directory: /home/.../projects/fortran/spas)
# Dependency change detected: ...
# Dependency change detected: ...
# Dependency change detected: ...
# Dependency change detected: ...
# Dependency change detected: ...
<ERROR>*cmd_build* Model error: Key test is not allowed in [build]
STOP 1
Compilation failed.

Note: There are more dependencies than those 5 have displayed.

Is it a matter of some dependency?

Any suggestions/ideas? Tia